Entanglement and Criticality in Quantum Impurity Systems

Details Entanglement and Criticality in Quantum Impurity Systems Entanglement and Criticality in Quantum Impurity Systems

2007-05-07

arxiv.org/abs/0705.0957v2

Phys. Rev. Lett. 99, 126801 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages and 5 figures; related to cond-mat/0612095; final version to appear in PRL

Scientific paper

10.1103/PhysRevLett.99.126801

We investigate the entanglement between a spin and its environment in impurity systems which exhibit a second-order quantum phase transition. As an application, we employ the spin-boson model, describing a two-level system (spin) coupled to a subohmic bosonic bath with power-law spectral density, ${\cal J}(\omega)\propto \omega^s$ and $0

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